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https://issues.apache.org/jira/browse/ARROW-11118?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ying Zhou updated ARROW-11118:
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Fix Version/s: 4.0.0
> [C++] Add union support in ORC reader & writer
> ----------------------------------------------
>
> Key: ARROW-11118
> URL: https://issues.apache.org/jira/browse/ARROW-11118
> Project: Apache Arrow
> Issue Type: New Feature
> Reporter: Ying Zhou
> Assignee: Ying Zhou
> Priority: Minor
> Labels: orc
> Fix For: 4.0.0
>
>
> Currently the ORC reader does not has support for the ORC UNION type which
> led to the ORC writer to be under-tested for ORC DENSE_UNION and SPARSE_UNION
> types. To fix this problem union support in the ORC reader needs to be added,
> union support in the ORC writer needs to be added and tested.
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